js进度条FLASH：a.swf用loadMovie()加载通过JS传过来的值的FLASH，怎么做进度条

FLASH：a.swf用loadMovie()加载通过JS传过来的值的FLASH，怎么做进度条

var _mcl:MovieClipLoader = new MovieClipLoader();trace("已加载:"+bytesLoaded/bytesTotal*100+"%");_mcl.loadClip("test.swf", _mc);};this.onLoadProgress = function(_mc:MovieClip, bytesLoaded:Number, bytesTotal:Number) {//创建一个MC来装载要加载的SWF或者图片_mcl.addListener(this);//=========加载进度显示==============this.createEmptyMovieClip("_mc", 2);//加载你要的SWF